feat(ext/node): embed std/node into the snapshot (#17724)

This commit moves "deno_std/node" in "ext/node" crate. The code is
transpiled and snapshotted during the build process.

During the first pass a minimal amount of work was done to create the
snapshot, a lot of code in "ext/node" depends on presence of "Deno"
global. This code will be gradually fixed in the follow up PRs to migrate
it to import relevant APIs from "internal:" modules.

Currently the code from snapshot is not used in any way, and all
Node/npm compatibility still uses code from 
"https://deno.land/std/node" (or from the location specified by 
"DENO_NODE_COMPAT_URL"). This will also be handled in a follow 
up PRs.

---------

Co-authored-by: crowlkats <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

1 files changed, 2074 insertions, 0 deletions

diff --git a/ext/node/polyfills/internal/buffer.d.ts b/ext/node/polyfills/internal/buffer.d.ts
new file mode 100644
index 000000000..638674467
--- /dev/null
+++ b/ext/node/polyfills/internal/buffer.d.ts
@@ -0,0 +1,2074 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright DefinitelyTyped contributors. All rights reserved. MIT license.
+
+/**
+ * One of many allowed encodings for the buffer content
+ * - ascii
+ * - base64
+ * - base64url
+ * - binary
+ * - hex
+ * - latin1
+ * - ucs-2
+ * - ucs2
+ * - utf-8
+ * - utf16le
+ * - utf8
+ */
+type Encoding = unknown;
+
+type WithImplicitCoercion<T> =
+  | T
+  | {
+    valueOf(): T;
+  };
+
+/**
+ * `Buffer` objects are used to represent a fixed-length sequence of bytes. Many
+ * Node.js APIs support `Buffer`s.
+ *
+ * The `Buffer` class is a subclass of JavaScript's [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) class and
+ * extends it with methods that cover additional use cases. Node.js APIs accept
+ * plain [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) s wherever `Buffer`s are supported as well.
+ *
+ * While the `Buffer` class is available within the global scope, it is still
+ * recommended to explicitly reference it via an import or require statement.
+ *
+ * ```js
+ * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+ *
+ * // Creates a zero-filled Buffer of length 10.
+ * const buf1 = Buffer.alloc(10);
+ *
+ * // Creates a Buffer of length 10,
+ * // filled with bytes which all have the value `1`.
+ * const buf2 = Buffer.alloc(10, 1);
+ *
+ * // Creates an uninitialized buffer of length 10.
+ * // This is faster than calling Buffer.alloc() but the returned
+ * // Buffer instance might contain old data that needs to be
+ * // overwritten using fill(), write(), or other functions that fill the Buffer's
+ * // contents.
+ * const buf3 = Buffer.allocUnsafe(10);
+ *
+ * // Creates a Buffer containing the bytes [1, 2, 3].
+ * const buf4 = Buffer.from([1, 2, 3]);
+ *
+ * // Creates a Buffer containing the bytes [1, 1, 1, 1] – the entries
+ * // are all truncated using `(value &#x26; 255)` to fit into the range 0–255.
+ * const buf5 = Buffer.from([257, 257.5, -255, '1']);
+ *
+ * // Creates a Buffer containing the UTF-8-encoded bytes for the string 'tést':
+ * // [0x74, 0xc3, 0xa9, 0x73, 0x74] (in hexadecimal notation)
+ * // [116, 195, 169, 115, 116] (in decimal notation)
+ * const buf6 = Buffer.from('tést');
+ *
+ * // Creates a Buffer containing the Latin-1 bytes [0x74, 0xe9, 0x73, 0x74].
+ * const buf7 = Buffer.from('tést', 'latin1');
+ * ```
+ * @see [source](https://github.com/nodejs/node/blob/v16.9.0/lib/buffer.js)
+ */
+export class Buffer extends Uint8Array {
+  /**
+   * Allocates a new buffer containing the given {str}.
+   *
+   * @param str String to store in buffer.
+   * @param encoding encoding to use, optional.  Default is 'utf8'
+   * @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead.
+   */
+  constructor(str: string, encoding?: Encoding);
+  /**
+   * Allocates a new buffer of {size} octets.
+   *
+   * @param size count of octets to allocate.
+   * @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`).
+   */
+  constructor(size: number);
+  /**
+   * Allocates a new buffer containing the given {array} of octets.
+   *
+   * @param array The octets to store.
+   * @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
+   */
+  constructor(array: Uint8Array);
+  /**
+   * Produces a Buffer backed by the same allocated memory as
+   * the given {ArrayBuffer}/{SharedArrayBuffer}.
+   *
+   * @param arrayBuffer The ArrayBuffer with which to share memory.
+   * @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead.
+   */
+  constructor(arrayBuffer: ArrayBuffer | SharedArrayBuffer);
+  /**
+   * Allocates a new buffer containing the given {array} of octets.
+   *
+   * @param array The octets to store.
+   * @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
+   */
+  constructor(array: ReadonlyArray<unknown>);
+  /**
+   * Copies the passed {buffer} data onto a new {Buffer} instance.
+   *
+   * @param buffer The buffer to copy.
+   * @deprecated since v10.0.0 - Use `Buffer.from(buffer)` instead.
+   */
+  constructor(buffer: Buffer);
+  /**
+   * Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`.
+   * Array entries outside that range will be truncated to fit into it.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
+   * const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
+   * ```
+   *
+   * A `TypeError` will be thrown if `array` is not an `Array` or another type
+   * appropriate for `Buffer.from()` variants.
+   *
+   * `Buffer.from(array)` and `Buffer.from(string)` may also use the internal`Buffer` pool like `Buffer.allocUnsafe()` does.
+   * @since v5.10.0
+   */
+  static from(
+    arrayBuffer: WithImplicitCoercion<ArrayBuffer | SharedArrayBuffer>,
+    byteOffset?: number,
+    length?: number,
+  ): Buffer;
+  /**
+   * Creates a new Buffer using the passed {data}
+   * @param data data to create a new Buffer
+   */
+  static from(data: Uint8Array | ReadonlyArray<number>): Buffer;
+  static from(
+    data: WithImplicitCoercion<Uint8Array | ReadonlyArray<number> | string>,
+  ): Buffer;
+  /**
+   * Creates a new Buffer containing the given JavaScript string {str}.
+   * If provided, the {encoding} parameter identifies the character encoding.
+   * If not provided, {encoding} defaults to 'utf8'.
+   */
+  static from(
+    str:
+      | WithImplicitCoercion<string>
+      | {
+        [Symbol.toPrimitive](hint: "string"): string;
+      },
+    encoding?: Encoding,
+  ): Buffer;
+  /**
+   * Creates a new Buffer using the passed {data}
+   * @param values to create a new Buffer
+   */
+  static of(...items: number[]): Buffer;
+  /**
+   * Returns `true` if `obj` is a `Buffer`, `false` otherwise.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * Buffer.isBuffer(Buffer.alloc(10)); // true
+   * Buffer.isBuffer(Buffer.from('foo')); // true
+   * Buffer.isBuffer('a string'); // false
+   * Buffer.isBuffer([]); // false
+   * Buffer.isBuffer(new Uint8Array(1024)); // false
+   * ```
+   * @since v0.1.101
+   */
+  static isBuffer(obj: unknown): obj is Buffer;
+  /**
+   * Returns `true` if `encoding` is the name of a supported character encoding,
+   * or `false` otherwise.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * console.log(Buffer.isEncoding('utf8'));
+   * // Prints: true
+   *
+   * console.log(Buffer.isEncoding('hex'));
+   * // Prints: true
+   *
+   * console.log(Buffer.isEncoding('utf/8'));
+   * // Prints: false
+   *
+   * console.log(Buffer.isEncoding(''));
+   * // Prints: false
+   * ```
+   * @since v0.9.1
+   * @param encoding A character encoding name to check.
+   */
+  static isEncoding(encoding: string): boolean;
+  /**
+   * Returns the byte length of a string when encoded using `encoding`.
+   * This is not the same as [`String.prototype.length`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/length), which does not account
+   * for the encoding that is used to convert the string into bytes.
+   *
+   * For `'base64'`, `'base64url'`, and `'hex'`, this function assumes valid input.
+   * For strings that contain non-base64/hex-encoded data (e.g. whitespace), the
+   * return value might be greater than the length of a `Buffer` created from the
+   * string.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const str = '\u00bd + \u00bc = \u00be';
+   *
+   * console.log(`${str}: ${str.length} characters, ` +
+   *             `${Buffer.byteLength(str, 'utf8')} bytes`);
+   * // Prints: ½ + ¼ = ¾: 9 characters, 12 bytes
+   * ```
+   *
+   * When `string` is a
+   * `Buffer`/[`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView)/[`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/-
+   * Reference/Global_Objects/TypedArray)/[`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer)/[`SharedArrayBuffer`](https://develop-
+   * er.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer), the byte length as reported by `.byteLength`is returned.
+   * @since v0.1.90
+   * @param string A value to calculate the length of.
+   * @param [encoding='utf8'] If `string` is a string, this is its encoding.
+   * @return The number of bytes contained within `string`.
+   */
+  static byteLength(
+    string:
+      | string
+      | ArrayBufferView
+      | ArrayBuffer
+      | SharedArrayBuffer,
+    encoding?: Encoding,
+  ): number;
+  /**
+   * Returns a new `Buffer` which is the result of concatenating all the `Buffer`instances in the `list` together.
+   *
+   * If the list has no items, or if the `totalLength` is 0, then a new zero-length`Buffer` is returned.
+   *
+   * If `totalLength` is not provided, it is calculated from the `Buffer` instances
+   * in `list` by adding their lengths.
+   *
+   * If `totalLength` is provided, it is coerced to an unsigned integer. If the
+   * combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
+   * truncated to `totalLength`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Create a single `Buffer` from a list of three `Buffer` instances.
+   *
+   * const buf1 = Buffer.alloc(10);
+   * const buf2 = Buffer.alloc(14);
+   * const buf3 = Buffer.alloc(18);
+   * const totalLength = buf1.length + buf2.length + buf3.length;
+   *
+   * console.log(totalLength);
+   * // Prints: 42
+   *
+   * const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
+   *
+   * console.log(bufA);
+   * // Prints: <Buffer 00 00 00 00 ...>
+   * console.log(bufA.length);
+   * // Prints: 42
+   * ```
+   *
+   * `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does.
+   * @since v0.7.11
+   * @param list List of `Buffer` or {@link Uint8Array} instances to concatenate.
+   * @param totalLength Total length of the `Buffer` instances in `list` when concatenated.
+   */
+  static concat(
+    list: ReadonlyArray<Uint8Array>,
+    totalLength?: number,
+  ): Buffer;
+  /**
+   * Compares `buf1` to `buf2`, typically for the purpose of sorting arrays of`Buffer` instances. This is equivalent to calling `buf1.compare(buf2)`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from('1234');
+   * const buf2 = Buffer.from('0123');
+   * const arr = [buf1, buf2];
+   *
+   * console.log(arr.sort(Buffer.compare));
+   * // Prints: [ <Buffer 30 31 32 33>, <Buffer 31 32 33 34> ]
+   * // (This result is equal to: [buf2, buf1].)
+   * ```
+   * @since v0.11.13
+   * @return Either `-1`, `0`, or `1`, depending on the result of the comparison. See `compare` for details.
+   */
+  static compare(buf1: Uint8Array, buf2: Uint8Array): number;
+  /**
+   * Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.alloc(5);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 00 00 00 00 00>
+   * ```
+   *
+   * If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_INVALID_ARG_VALUE` is thrown.
+   *
+   * If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.alloc(5, 'a');
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 61 61 61 61 61>
+   * ```
+   *
+   * If both `fill` and `encoding` are specified, the allocated `Buffer` will be
+   * initialized by calling `buf.fill(fill, encoding)`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
+   * ```
+   *
+   * Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance
+   * contents will never contain sensitive data from previous allocations, including
+   * data that might not have been allocated for `Buffer`s.
+   *
+   * A `TypeError` will be thrown if `size` is not a number.
+   * @since v5.10.0
+   * @param size The desired length of the new `Buffer`.
+   * @param [fill=0] A value to pre-fill the new `Buffer` with.
+   * @param [encoding='utf8'] If `fill` is a string, this is its encoding.
+   */
+  static alloc(
+    size: number,
+    fill?: string | Uint8Array | number,
+    encoding?: Encoding,
+  ): Buffer;
+  /**
+   * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_INVALID_ARG_VALUE` is thrown.
+   *
+   * The underlying memory for `Buffer` instances created in this way is _not_
+   * _initialized_. The contents of the newly created `Buffer` are unknown and_may contain sensitive data_. Use `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(10);
+   *
+   * console.log(buf);
+   * // Prints (contents may vary): <Buffer a0 8b 28 3f 01 00 00 00 50 32>
+   *
+   * buf.fill(0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 00 00 00 00 00 00 00 00 00 00>
+   * ```
+   *
+   * A `TypeError` will be thrown if `size` is not a number.
+   *
+   * The `Buffer` module pre-allocates an internal `Buffer` instance of
+   * size `Buffer.poolSize` that is used as a pool for the fast allocation of new`Buffer` instances created using `Buffer.allocUnsafe()`,`Buffer.from(array)`, `Buffer.concat()`, and the
+   * deprecated`new Buffer(size)` constructor only when `size` is less than or equal
+   * to `Buffer.poolSize >> 1` (floor of `Buffer.poolSize` divided by two).
+   *
+   * Use of this pre-allocated internal memory pool is a key difference between
+   * calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
+   * Specifically, `Buffer.alloc(size, fill)` will _never_ use the internal `Buffer`pool, while `Buffer.allocUnsafe(size).fill(fill)`_will_ use the internal`Buffer` pool if `size` is less
+   * than or equal to half `Buffer.poolSize`. The
+   * difference is subtle but can be important when an application requires the
+   * additional performance that `Buffer.allocUnsafe()` provides.
+   * @since v5.10.0
+   * @param size The desired length of the new `Buffer`.
+   */
+  static allocUnsafe(size: number): Buffer;
+  /**
+   * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_INVALID_ARG_VALUE` is thrown. A zero-length `Buffer` is created
+   * if `size` is 0.
+   *
+   * The underlying memory for `Buffer` instances created in this way is _not_
+   * _initialized_. The contents of the newly created `Buffer` are unknown and_may contain sensitive data_. Use `buf.fill(0)` to initialize
+   * such `Buffer` instances with zeroes.
+   *
+   * When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
+   * allocations under 4 KB are sliced from a single pre-allocated `Buffer`. This
+   * allows applications to avoid the garbage collection overhead of creating many
+   * individually allocated `Buffer` instances. This approach improves both
+   * performance and memory usage by eliminating the need to track and clean up as
+   * many individual `ArrayBuffer` objects.
+   *
+   * However, in the case where a developer may need to retain a small chunk of
+   * memory from a pool for an indeterminate amount of time, it may be appropriate
+   * to create an un-pooled `Buffer` instance using `Buffer.allocUnsafeSlow()` and
+   * then copying out the relevant bits.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Need to keep around a few small chunks of memory.
+   * const store = [];
+   *
+   * socket.on('readable', () => {
+   *   let data;
+   *   while (null !== (data = readable.read())) {
+   *     // Allocate for retained data.
+   *     const sb = Buffer.allocUnsafeSlow(10);
+   *
+   *     // Copy the data into the new allocation.
+   *     data.copy(sb, 0, 0, 10);
+   *
+   *     store.push(sb);
+   *   }
+   * });
+   * ```
+   *
+   * A `TypeError` will be thrown if `size` is not a number.
+   * @since v5.12.0
+   * @param size The desired length of the new `Buffer`.
+   */
+  static allocUnsafeSlow(size: number): Buffer;
+  // /**
+  //  * This is the size (in bytes) of pre-allocated internal `Buffer` instances used
+  //  * for pooling. This value may be modified.
+  //  * @since v0.11.3
+  //  */
+  // static poolSize: number;
+
+  /**
+   * Writes `string` to `buf` at `offset` according to the character encoding in`encoding`. The `length` parameter is the number of bytes to write. If `buf` did
+   * not contain enough space to fit the entire string, only part of `string` will be
+   * written. However, partially encoded characters will not be written.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.alloc(256);
+   *
+   * const len = buf.write('\u00bd + \u00bc = \u00be', 0);
+   *
+   * console.log(`${len} bytes: ${buf.toString('utf8', 0, len)}`);
+   * // Prints: 12 bytes: ½ + ¼ = ¾
+   *
+   * const buffer = Buffer.alloc(10);
+   *
+   * const length = buffer.write('abcd', 8);
+   *
+   * console.log(`${length} bytes: ${buffer.toString('utf8', 8, 10)}`);
+   * // Prints: 2 bytes : ab
+   * ```
+   * @since v0.1.90
+   * @param string String to write to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write `string`.
+   * @param [length=buf.length - offset] Maximum number of bytes to write (written bytes will not exceed `buf.length - offset`).
+   * @param [encoding='utf8'] The character encoding of `string`.
+   * @return Number of bytes written.
+   */
+  write(string: string, encoding?: Encoding): number;
+  write(string: string, offset: number, encoding?: Encoding): number;
+  write(
+    string: string,
+    offset: number,
+    length: number,
+    encoding?: Encoding,
+  ): number;
+  /**
+   * Decodes `buf` to a string according to the specified character encoding in`encoding`. `start` and `end` may be passed to decode only a subset of `buf`.
+   *
+   * If `encoding` is `'utf8'` and a byte sequence in the input is not valid UTF-8,
+   * then each invalid byte is replaced with the replacement character `U+FFFD`.
+   *
+   * The maximum length of a string instance (in UTF-16 code units) is available
+   * as {@link constants.MAX_STRING_LENGTH}.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.allocUnsafe(26);
+   *
+   * for (let i = 0; i < 26; i++) {
+   *   // 97 is the decimal ASCII value for 'a'.
+   *   buf1[i] = i + 97;
+   * }
+   *
+   * console.log(buf1.toString('utf8'));
+   * // Prints: abcdefghijklmnopqrstuvwxyz
+   * console.log(buf1.toString('utf8', 0, 5));
+   * // Prints: abcde
+   *
+   * const buf2 = Buffer.from('tést');
+   *
+   * console.log(buf2.toString('hex'));
+   * // Prints: 74c3a97374
+   * console.log(buf2.toString('utf8', 0, 3));
+   * // Prints: té
+   * console.log(buf2.toString(undefined, 0, 3));
+   * // Prints: té
+   * ```
+   * @since v0.1.90
+   * @param [encoding='utf8'] The character encoding to use.
+   * @param [start=0] The byte offset to start decoding at.
+   * @param [end=buf.length] The byte offset to stop decoding at (not inclusive).
+   */
+  toString(encoding?: Encoding, start?: number, end?: number): string;
+  /**
+   * Returns a JSON representation of `buf`. [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) implicitly calls
+   * this function when stringifying a `Buffer` instance.
+   *
+   * `Buffer.from()` accepts objects in the format returned from this method.
+   * In particular, `Buffer.from(buf.toJSON())` works like `Buffer.from(buf)`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5]);
+   * const json = JSON.stringify(buf);
+   *
+   * console.log(json);
+   * // Prints: {"type":"Buffer","data":[1,2,3,4,5]}
+   *
+   * const copy = JSON.parse(json, (key, value) => {
+   *   return value &#x26;&#x26; value.type === 'Buffer' ?
+   *     Buffer.from(value) :
+   *     value;
+   * });
+   *
+   * console.log(copy);
+   * // Prints: <Buffer 01 02 03 04 05>
+   * ```
+   * @since v0.9.2
+   */
+  toJSON(): {
+    type: "Buffer";
+    data: number[];
+  };
+  /**
+   * Returns `true` if both `buf` and `otherBuffer` have exactly the same bytes,`false` otherwise. Equivalent to `buf.compare(otherBuffer) === 0`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from('ABC');
+   * const buf2 = Buffer.from('414243', 'hex');
+   * const buf3 = Buffer.from('ABCD');
+   *
+   * console.log(buf1.equals(buf2));
+   * // Prints: true
+   * console.log(buf1.equals(buf3));
+   * // Prints: false
+   * ```
+   * @since v0.11.13
+   * @param otherBuffer A `Buffer` or {@link Uint8Array} with which to compare `buf`.
+   */
+  equals(otherBuffer: Uint8Array): boolean;
+  /**
+   * Compares `buf` with `target` and returns a number indicating whether `buf`comes before, after, or is the same as `target` in sort order.
+   * Comparison is based on the actual sequence of bytes in each `Buffer`.
+   *
+   * * `0` is returned if `target` is the same as `buf`
+   * * `1` is returned if `target` should come _before_`buf` when sorted.
+   * * `-1` is returned if `target` should come _after_`buf` when sorted.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from('ABC');
+   * const buf2 = Buffer.from('BCD');
+   * const buf3 = Buffer.from('ABCD');
+   *
+   * console.log(buf1.compare(buf1));
+   * // Prints: 0
+   * console.log(buf1.compare(buf2));
+   * // Prints: -1
+   * console.log(buf1.compare(buf3));
+   * // Prints: -1
+   * console.log(buf2.compare(buf1));
+   * // Prints: 1
+   * console.log(buf2.compare(buf3));
+   * // Prints: 1
+   * console.log([buf1, buf2, buf3].sort(Buffer.compare));
+   * // Prints: [ <Buffer 41 42 43>, <Buffer 41 42 43 44>, <Buffer 42 43 44> ]
+   * // (This result is equal to: [buf1, buf3, buf2].)
+   * ```
+   *
+   * The optional `targetStart`, `targetEnd`, `sourceStart`, and `sourceEnd`arguments can be used to limit the comparison to specific ranges within `target`and `buf` respectively.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8, 9]);
+   * const buf2 = Buffer.from([5, 6, 7, 8, 9, 1, 2, 3, 4]);
+   *
+   * console.log(buf1.compare(buf2, 5, 9, 0, 4));
+   * // Prints: 0
+   * console.log(buf1.compare(buf2, 0, 6, 4));
+   * // Prints: -1
+   * console.log(buf1.compare(buf2, 5, 6, 5));
+   * // Prints: 1
+   * ```
+   *
+   * `ERR_OUT_OF_RANGE` is thrown if `targetStart < 0`, `sourceStart < 0`,`targetEnd > target.byteLength`, or `sourceEnd > source.byteLength`.
+   * @since v0.11.13
+   * @param target A `Buffer` or {@link Uint8Array} with which to compare `buf`.
+   * @param [targetStart=0] The offset within `target` at which to begin comparison.
+   * @param [targetEnd=target.length] The offset within `target` at which to end comparison (not inclusive).
+   * @param [sourceStart=0] The offset within `buf` at which to begin comparison.
+   * @param [sourceEnd=buf.length] The offset within `buf` at which to end comparison (not inclusive).
+   */
+  compare(
+    target: Uint8Array,
+    targetStart?: number,
+    targetEnd?: number,
+    sourceStart?: number,
+    sourceEnd?: number,
+  ): number;
+  /**
+   * Copies data from a region of `buf` to a region in `target`, even if the `target`memory region overlaps with `buf`.
+   *
+   * [`TypedArray.prototype.set()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/set) performs the same operation, and is available
+   * for all TypedArrays, including Node.js `Buffer`s, although it takes
+   * different function arguments.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Create two `Buffer` instances.
+   * const buf1 = Buffer.allocUnsafe(26);
+   * const buf2 = Buffer.allocUnsafe(26).fill('!');
+   *
+   * for (let i = 0; i < 26; i++) {
+   *   // 97 is the decimal ASCII value for 'a'.
+   *   buf1[i] = i + 97;
+   * }
+   *
+   * // Copy `buf1` bytes 16 through 19 into `buf2` starting at byte 8 of `buf2`.
+   * buf1.copy(buf2, 8, 16, 20);
+   * // This is equivalent to:
+   * // buf2.set(buf1.subarray(16, 20), 8);
+   *
+   * console.log(buf2.toString('ascii', 0, 25));
+   * // Prints: !!!!!!!!qrst!!!!!!!!!!!!!
+   * ```
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Create a `Buffer` and copy data from one region to an overlapping region
+   * // within the same `Buffer`.
+   *
+   * const buf = Buffer.allocUnsafe(26);
+   *
+   * for (let i = 0; i < 26; i++) {
+   *   // 97 is the decimal ASCII value for 'a'.
+   *   buf[i] = i + 97;
+   * }
+   *
+   * buf.copy(buf, 0, 4, 10);
+   *
+   * console.log(buf.toString());
+   * // Prints: efghijghijklmnopqrstuvwxyz
+   * ```
+   * @since v0.1.90
+   * @param target A `Buffer` or {@link Uint8Array} to copy into.
+   * @param [targetStart=0] The offset within `target` at which to begin writing.
+   * @param [sourceStart=0] The offset within `buf` from which to begin copying.
+   * @param [sourceEnd=buf.length] The offset within `buf` at which to stop copying (not inclusive).
+   * @return The number of bytes copied.
+   */
+  copy(
+    target: Uint8Array,
+    targetStart?: number,
+    sourceStart?: number,
+    sourceEnd?: number,
+  ): number;
+  /**
+   * Returns a new `Buffer` that references the same memory as the original, but
+   * offset and cropped by the `start` and `end` indices.
+   *
+   * This is the same behavior as `buf.subarray()`.
+   *
+   * This method is not compatible with the `Uint8Array.prototype.slice()`,
+   * which is a superclass of `Buffer`. To copy the slice, use`Uint8Array.prototype.slice()`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('buffer');
+   *
+   * const copiedBuf = Uint8Array.prototype.slice.call(buf);
+   * copiedBuf[0]++;
+   * console.log(copiedBuf.toString());
+   * // Prints: cuffer
+   *
+   * console.log(buf.toString());
+   * // Prints: buffer
+   * ```
+   * @since v0.3.0
+   * @param [start=0] Where the new `Buffer` will start.
+   * @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
+   */
+  slice(start?: number, end?: number): Buffer;
+  /**
+   * Returns a new `Buffer` that references the same memory as the original, but
+   * offset and cropped by the `start` and `end` indices.
+   *
+   * Specifying `end` greater than `buf.length` will return the same result as
+   * that of `end` equal to `buf.length`.
+   *
+   * This method is inherited from [`TypedArray.prototype.subarray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray).
+   *
+   * Modifying the new `Buffer` slice will modify the memory in the original `Buffer`because the allocated memory of the two objects overlap.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
+   * // from the original `Buffer`.
+   *
+   * const buf1 = Buffer.allocUnsafe(26);
+   *
+   * for (let i = 0; i < 26; i++) {
+   *   // 97 is the decimal ASCII value for 'a'.
+   *   buf1[i] = i + 97;
+   * }
+   *
+   * const buf2 = buf1.subarray(0, 3);
+   *
+   * console.log(buf2.toString('ascii', 0, buf2.length));
+   * // Prints: abc
+   *
+   * buf1[0] = 33;
+   *
+   * console.log(buf2.toString('ascii', 0, buf2.length));
+   * // Prints: !bc
+   * ```
+   *
+   * Specifying negative indexes causes the slice to be generated relative to the
+   * end of `buf` rather than the beginning.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('buffer');
+   *
+   * console.log(buf.subarray(-6, -1).toString());
+   * // Prints: buffe
+   * // (Equivalent to buf.subarray(0, 5).)
+   *
+   * console.log(buf.subarray(-6, -2).toString());
+   * // Prints: buff
+   * // (Equivalent to buf.subarray(0, 4).)
+   *
+   * console.log(buf.subarray(-5, -2).toString());
+   * // Prints: uff
+   * // (Equivalent to buf.subarray(1, 4).)
+   * ```
+   * @since v3.0.0
+   * @param [start=0] Where the new `Buffer` will start.
+   * @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
+   */
+  subarray(start?: number, end?: number): Buffer;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian.
+   *
+   * `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(8);
+   *
+   * buf.writeBigInt64BE(0x0102030405060708n, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+   * ```
+   * @since v12.0.0, v10.20.0
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeBigInt64BE(value: bigint, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian.
+   *
+   * `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(8);
+   *
+   * buf.writeBigInt64LE(0x0102030405060708n, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 08 07 06 05 04 03 02 01>
+   * ```
+   * @since v12.0.0, v10.20.0
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeBigInt64LE(value: bigint, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian.
+   *
+   * This function is also available under the `writeBigUint64BE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(8);
+   *
+   * buf.writeBigUInt64BE(0xdecafafecacefaden, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer de ca fa fe ca ce fa de>
+   * ```
+   * @since v12.0.0, v10.20.0
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeBigUInt64BE(value: bigint, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(8);
+   *
+   * buf.writeBigUInt64LE(0xdecafafecacefaden, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer de fa ce ca fe fa ca de>
+   * ```
+   *
+   * This function is also available under the `writeBigUint64LE` alias.
+   * @since v12.0.0, v10.20.0
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeBigUInt64LE(value: bigint, offset?: number): number;
+  /**
+   * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as little-endian. Supports up to 48 bits of accuracy. Behavior is undefined
+   * when `value` is anything other than an unsigned integer.
+   *
+   * This function is also available under the `writeUintLE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(6);
+   *
+   * buf.writeUIntLE(0x1234567890ab, 0, 6);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer ab 90 78 56 34 12>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUIntLE(value: number, offset: number, byteLength: number): number;
+  /**
+   * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined
+   * when `value` is anything other than an unsigned integer.
+   *
+   * This function is also available under the `writeUintBE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(6);
+   *
+   * buf.writeUIntBE(0x1234567890ab, 0, 6);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 12 34 56 78 90 ab>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUIntBE(value: number, offset: number, byteLength: number): number;
+  /**
+   * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as little-endian. Supports up to 48 bits of accuracy. Behavior is undefined
+   * when `value` is anything other than a signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(6);
+   *
+   * buf.writeIntLE(0x1234567890ab, 0, 6);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer ab 90 78 56 34 12>
+   * ```
+   * @since v0.11.15
+   * @param value Number to be written to `buf`.
+   * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeIntLE(value: number, offset: number, byteLength: number): number;
+  /**
+   * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined when`value` is anything other than a
+   * signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(6);
+   *
+   * buf.writeIntBE(0x1234567890ab, 0, 6);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 12 34 56 78 90 ab>
+   * ```
+   * @since v0.11.15
+   * @param value Number to be written to `buf`.
+   * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeIntBE(value: number, offset: number, byteLength: number): number;
+  /**
+   * Reads an unsigned, big-endian 64-bit integer from `buf` at the specified`offset`.
+   *
+   * This function is also available under the `readBigUint64BE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);
+   *
+   * console.log(buf.readBigUInt64BE(0));
+   * // Prints: 4294967295n
+   * ```
+   * @since v12.0.0, v10.20.0
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+   */
+  readBigUInt64BE(offset?: number): bigint;
+  /**
+   * Reads an unsigned, little-endian 64-bit integer from `buf` at the specified`offset`.
+   *
+   * This function is also available under the `readBigUint64LE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);
+   *
+   * console.log(buf.readBigUInt64LE(0));
+   * // Prints: 18446744069414584320n
+   * ```
+   * @since v12.0.0, v10.20.0
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+   */
+  readBigUInt64LE(offset?: number): bigint;
+  /**
+   * Reads a signed, big-endian 64-bit integer from `buf` at the specified `offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed
+   * values.
+   * @since v12.0.0, v10.20.0
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+   */
+  readBigInt64BE(offset?: number): bigint;
+  /**
+   * Reads a signed, little-endian 64-bit integer from `buf` at the specified`offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed
+   * values.
+   * @since v12.0.0, v10.20.0
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+   */
+  readBigInt64LE(offset?: number): bigint;
+  /**
+   * Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as an unsigned, little-endian integer supporting
+   * up to 48 bits of accuracy.
+   *
+   * This function is also available under the `readUintLE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+   *
+   * console.log(buf.readUIntLE(0, 6).toString(16));
+   * // Prints: ab9078563412
+   * ```
+   * @since v0.11.15
+   * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+   */
+  readUIntLE(offset: number, byteLength: number): number;
+  /**
+   * Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as an unsigned big-endian integer supporting
+   * up to 48 bits of accuracy.
+   *
+   * This function is also available under the `readUintBE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+   *
+   * console.log(buf.readUIntBE(0, 6).toString(16));
+   * // Prints: 1234567890ab
+   * console.log(buf.readUIntBE(1, 6).toString(16));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.11.15
+   * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+   */
+  readUIntBE(offset: number, byteLength: number): number;
+  /**
+   * Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as a little-endian, two's complement signed value
+   * supporting up to 48 bits of accuracy.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+   *
+   * console.log(buf.readIntLE(0, 6).toString(16));
+   * // Prints: -546f87a9cbee
+   * ```
+   * @since v0.11.15
+   * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+   */
+  readIntLE(offset: number, byteLength: number): number;
+  /**
+   * Reads `byteLength` number of bytes from `buf` at the specified `offset`and interprets the result as a big-endian, two's complement signed value
+   * supporting up to 48 bits of accuracy.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+   *
+   * console.log(buf.readIntBE(0, 6).toString(16));
+   * // Prints: 1234567890ab
+   * console.log(buf.readIntBE(1, 6).toString(16));
+   * // Throws ERR_OUT_OF_RANGE.
+   * console.log(buf.readIntBE(1, 0).toString(16));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.11.15
+   * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+   * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+   */
+  readIntBE(offset: number, byteLength: number): number;
+  /**
+   * Reads an unsigned 8-bit integer from `buf` at the specified `offset`.
+   *
+   * This function is also available under the `readUint8` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([1, -2]);
+   *
+   * console.log(buf.readUInt8(0));
+   * // Prints: 1
+   * console.log(buf.readUInt8(1));
+   * // Prints: 254
+   * console.log(buf.readUInt8(2));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.5.0
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.
+   */
+  readUInt8(offset?: number): number;
+  /**
+   * Reads an unsigned, little-endian 16-bit integer from `buf` at the specified`offset`.
+   *
+   * This function is also available under the `readUint16LE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56]);
+   *
+   * console.log(buf.readUInt16LE(0).toString(16));
+   * // Prints: 3412
+   * console.log(buf.readUInt16LE(1).toString(16));
+   * // Prints: 5634
+   * console.log(buf.readUInt16LE(2).toString(16));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+   */
+  readUInt16LE(offset?: number): number;
+  /**
+   * Reads an unsigned, big-endian 16-bit integer from `buf` at the specified`offset`.
+   *
+   * This function is also available under the `readUint16BE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56]);
+   *
+   * console.log(buf.readUInt16BE(0).toString(16));
+   * // Prints: 1234
+   * console.log(buf.readUInt16BE(1).toString(16));
+   * // Prints: 3456
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+   */
+  readUInt16BE(offset?: number): number;
+  /**
+   * Reads an unsigned, little-endian 32-bit integer from `buf` at the specified`offset`.
+   *
+   * This function is also available under the `readUint32LE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);
+   *
+   * console.log(buf.readUInt32LE(0).toString(16));
+   * // Prints: 78563412
+   * console.log(buf.readUInt32LE(1).toString(16));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+   */
+  readUInt32LE(offset?: number): number;
+  /**
+   * Reads an unsigned, big-endian 32-bit integer from `buf` at the specified`offset`.
+   *
+   * This function is also available under the `readUint32BE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);
+   *
+   * console.log(buf.readUInt32BE(0).toString(16));
+   * // Prints: 12345678
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+   */
+  readUInt32BE(offset?: number): number;
+  /**
+   * Reads a signed 8-bit integer from `buf` at the specified `offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed values.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([-1, 5]);
+   *
+   * console.log(buf.readInt8(0));
+   * // Prints: -1
+   * console.log(buf.readInt8(1));
+   * // Prints: 5
+   * console.log(buf.readInt8(2));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.5.0
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.
+   */
+  readInt8(offset?: number): number;
+  /**
+   * Reads a signed, little-endian 16-bit integer from `buf` at the specified`offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed values.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0, 5]);
+   *
+   * console.log(buf.readInt16LE(0));
+   * // Prints: 1280
+   * console.log(buf.readInt16LE(1));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+   */
+  readInt16LE(offset?: number): number;
+  /**
+   * Reads a signed, big-endian 16-bit integer from `buf` at the specified `offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed values.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0, 5]);
+   *
+   * console.log(buf.readInt16BE(0));
+   * // Prints: 5
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+   */
+  readInt16BE(offset?: number): number;
+  /**
+   * Reads a signed, little-endian 32-bit integer from `buf` at the specified`offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed values.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0, 0, 0, 5]);
+   *
+   * console.log(buf.readInt32LE(0));
+   * // Prints: 83886080
+   * console.log(buf.readInt32LE(1));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+   */
+  readInt32LE(offset?: number): number;
+  /**
+   * Reads a signed, big-endian 32-bit integer from `buf` at the specified `offset`.
+   *
+   * Integers read from a `Buffer` are interpreted as two's complement signed values.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([0, 0, 0, 5]);
+   *
+   * console.log(buf.readInt32BE(0));
+   * // Prints: 5
+   * ```
+   * @since v0.5.5
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+   */
+  readInt32BE(offset?: number): number;
+  /**
+   * Reads a 32-bit, little-endian float from `buf` at the specified `offset`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([1, 2, 3, 4]);
+   *
+   * console.log(buf.readFloatLE(0));
+   * // Prints: 1.539989614439558e-36
+   * console.log(buf.readFloatLE(1));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.11.15
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+   */
+  readFloatLE(offset?: number): number;
+  /**
+   * Reads a 32-bit, big-endian float from `buf` at the specified `offset`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([1, 2, 3, 4]);
+   *
+   * console.log(buf.readFloatBE(0));
+   * // Prints: 2.387939260590663e-38
+   * ```
+   * @since v0.11.15
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+   */
+  readFloatBE(offset?: number): number;
+  /**
+   * Reads a 64-bit, little-endian double from `buf` at the specified `offset`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
+   *
+   * console.log(buf.readDoubleLE(0));
+   * // Prints: 5.447603722011605e-270
+   * console.log(buf.readDoubleLE(1));
+   * // Throws ERR_OUT_OF_RANGE.
+   * ```
+   * @since v0.11.15
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.
+   */
+  readDoubleLE(offset?: number): number;
+  /**
+   * Reads a 64-bit, big-endian double from `buf` at the specified `offset`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
+   *
+   * console.log(buf.readDoubleBE(0));
+   * // Prints: 8.20788039913184e-304
+   * ```
+   * @since v0.11.15
+   * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.
+   */
+  readDoubleBE(offset?: number): number;
+  reverse(): this;
+  /**
+   * Interprets `buf` as an array of unsigned 16-bit integers and swaps the
+   * byte order _in-place_. Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 2.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
+   *
+   * console.log(buf1);
+   * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+   *
+   * buf1.swap16();
+   *
+   * console.log(buf1);
+   * // Prints: <Buffer 02 01 04 03 06 05 08 07>
+   *
+   * const buf2 = Buffer.from([0x1, 0x2, 0x3]);
+   *
+   * buf2.swap16();
+   * // Throws ERR_INVALID_BUFFER_SIZE.
+   * ```
+   *
+   * One convenient use of `buf.swap16()` is to perform a fast in-place conversion
+   * between UTF-16 little-endian and UTF-16 big-endian:
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
+   * buf.swap16(); // Convert to big-endian UTF-16 text.
+   * ```
+   * @since v5.10.0
+   * @return A reference to `buf`.
+   */
+  swap16(): Buffer;
+  /**
+   * Interprets `buf` as an array of unsigned 32-bit integers and swaps the
+   * byte order _in-place_. Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 4.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
+   *
+   * console.log(buf1);
+   * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+   *
+   * buf1.swap32();
+   *
+   * console.log(buf1);
+   * // Prints: <Buffer 04 03 02 01 08 07 06 05>
+   *
+   * const buf2 = Buffer.from([0x1, 0x2, 0x3]);
+   *
+   * buf2.swap32();
+   * // Throws ERR_INVALID_BUFFER_SIZE.
+   * ```
+   * @since v5.10.0
+   * @return A reference to `buf`.
+   */
+  swap32(): Buffer;
+  /**
+   * Interprets `buf` as an array of 64-bit numbers and swaps byte order _in-place_.
+   * Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 8.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
+   *
+   * console.log(buf1);
+   * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+   *
+   * buf1.swap64();
+   *
+   * console.log(buf1);
+   * // Prints: <Buffer 08 07 06 05 04 03 02 01>
+   *
+   * const buf2 = Buffer.from([0x1, 0x2, 0x3]);
+   *
+   * buf2.swap64();
+   * // Throws ERR_INVALID_BUFFER_SIZE.
+   * ```
+   * @since v6.3.0
+   * @return A reference to `buf`.
+   */
+  swap64(): Buffer;
+  /**
+   * Writes `value` to `buf` at the specified `offset`. `value` must be a
+   * valid unsigned 8-bit integer. Behavior is undefined when `value` is anything
+   * other than an unsigned 8-bit integer.
+   *
+   * This function is also available under the `writeUint8` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeUInt8(0x3, 0);
+   * buf.writeUInt8(0x4, 1);
+   * buf.writeUInt8(0x23, 2);
+   * buf.writeUInt8(0x42, 3);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 03 04 23 42>
+   * ```
+   * @since v0.5.0
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUInt8(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid unsigned 16-bit integer. Behavior is undefined when `value` is
+   * anything other than an unsigned 16-bit integer.
+   *
+   * This function is also available under the `writeUint16LE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeUInt16LE(0xdead, 0);
+   * buf.writeUInt16LE(0xbeef, 2);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer ad de ef be>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUInt16LE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid unsigned 16-bit integer. Behavior is undefined when `value`is anything other than an
+   * unsigned 16-bit integer.
+   *
+   * This function is also available under the `writeUint16BE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeUInt16BE(0xdead, 0);
+   * buf.writeUInt16BE(0xbeef, 2);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer de ad be ef>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUInt16BE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid unsigned 32-bit integer. Behavior is undefined when `value` is
+   * anything other than an unsigned 32-bit integer.
+   *
+   * This function is also available under the `writeUint32LE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeUInt32LE(0xfeedface, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer ce fa ed fe>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUInt32LE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid unsigned 32-bit integer. Behavior is undefined when `value`is anything other than an
+   * unsigned 32-bit integer.
+   *
+   * This function is also available under the `writeUint32BE` alias.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeUInt32BE(0xfeedface, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer fe ed fa ce>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeUInt32BE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset`. `value` must be a valid
+   * signed 8-bit integer. Behavior is undefined when `value` is anything other than
+   * a signed 8-bit integer.
+   *
+   * `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(2);
+   *
+   * buf.writeInt8(2, 0);
+   * buf.writeInt8(-2, 1);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 02 fe>
+   * ```
+   * @since v0.5.0
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeInt8(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian.  The `value`must be a valid signed 16-bit integer. Behavior is undefined when `value` is
+   * anything other than a signed 16-bit integer.
+   *
+   * The `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(2);
+   *
+   * buf.writeInt16LE(0x0304, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 04 03>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeInt16LE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian.  The `value`must be a valid signed 16-bit integer. Behavior is undefined when `value` is
+   * anything other than a signed 16-bit integer.
+   *
+   * The `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(2);
+   *
+   * buf.writeInt16BE(0x0102, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 01 02>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeInt16BE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a valid signed 32-bit integer. Behavior is undefined when `value` is
+   * anything other than a signed 32-bit integer.
+   *
+   * The `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeInt32LE(0x05060708, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 08 07 06 05>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeInt32LE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a valid signed 32-bit integer. Behavior is undefined when `value` is
+   * anything other than a signed 32-bit integer.
+   *
+   * The `value` is interpreted and written as a two's complement signed integer.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeInt32BE(0x01020304, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 01 02 03 04>
+   * ```
+   * @since v0.5.5
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeInt32BE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian. Behavior is
+   * undefined when `value` is anything other than a JavaScript number.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeFloatLE(0xcafebabe, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer bb fe 4a 4f>
+   * ```
+   * @since v0.11.15
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeFloatLE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian. Behavior is
+   * undefined when `value` is anything other than a JavaScript number.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(4);
+   *
+   * buf.writeFloatBE(0xcafebabe, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 4f 4a fe bb>
+   * ```
+   * @since v0.11.15
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeFloatBE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as little-endian. The `value`must be a JavaScript number. Behavior is undefined when `value` is anything
+   * other than a JavaScript number.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(8);
+   *
+   * buf.writeDoubleLE(123.456, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 77 be 9f 1a 2f dd 5e 40>
+   * ```
+   * @since v0.11.15
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeDoubleLE(value: number, offset?: number): number;
+  /**
+   * Writes `value` to `buf` at the specified `offset` as big-endian. The `value`must be a JavaScript number. Behavior is undefined when `value` is anything
+   * other than a JavaScript number.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(8);
+   *
+   * buf.writeDoubleBE(123.456, 0);
+   *
+   * console.log(buf);
+   * // Prints: <Buffer 40 5e dd 2f 1a 9f be 77>
+   * ```
+   * @since v0.11.15
+   * @param value Number to be written to `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.
+   * @return `offset` plus the number of bytes written.
+   */
+  writeDoubleBE(value: number, offset?: number): number;
+  /**
+   * Fills `buf` with the specified `value`. If the `offset` and `end` are not given,
+   * the entire `buf` will be filled:
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Fill a `Buffer` with the ASCII character 'h'.
+   *
+   * const b = Buffer.allocUnsafe(50).fill('h');
+   *
+   * console.log(b.toString());
+   * // Prints: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
+   * ```
+   *
+   * `value` is coerced to a `uint32` value if it is not a string, `Buffer`, or
+   * integer. If the resulting integer is greater than `255` (decimal), `buf` will be
+   * filled with `value &#x26; 255`.
+   *
+   * If the final write of a `fill()` operation falls on a multi-byte character,
+   * then only the bytes of that character that fit into `buf` are written:
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Fill a `Buffer` with character that takes up two bytes in UTF-8.
+   *
+   * console.log(Buffer.allocUnsafe(5).fill('\u0222'));
+   * // Prints: <Buffer c8 a2 c8 a2 c8>
+   * ```
+   *
+   * If `value` contains invalid characters, it is truncated; if no valid
+   * fill data remains, an exception is thrown:
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.allocUnsafe(5);
+   *
+   * console.log(buf.fill('a'));
+   * // Prints: <Buffer 61 61 61 61 61>
+   * console.log(buf.fill('aazz', 'hex'));
+   * // Prints: <Buffer aa aa aa aa aa>
+   * console.log(buf.fill('zz', 'hex'));
+   * // Throws an exception.
+   * ```
+   * @since v0.5.0
+   * @param value The value with which to fill `buf`.
+   * @param [offset=0] Number of bytes to skip before starting to fill `buf`.
+   * @param [end=buf.length] Where to stop filling `buf` (not inclusive).
+   * @param [encoding='utf8'] The encoding for `value` if `value` is a string.
+   * @return A reference to `buf`.
+   */
+  fill(
+    value: string | Uint8Array | number,
+    offset?: number,
+    end?: number,
+    encoding?: Encoding,
+  ): this;
+  /**
+   * If `value` is:
+   *
+   * * a string, `value` is interpreted according to the character encoding in`encoding`.
+   * * a `Buffer` or [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array), `value` will be used in its entirety.
+   * To compare a partial `Buffer`, use `buf.slice()`.
+   * * a number, `value` will be interpreted as an unsigned 8-bit integer
+   * value between `0` and `255`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('this is a buffer');
+   *
+   * console.log(buf.indexOf('this'));
+   * // Prints: 0
+   * console.log(buf.indexOf('is'));
+   * // Prints: 2
+   * console.log(buf.indexOf(Buffer.from('a buffer')));
+   * // Prints: 8
+   * console.log(buf.indexOf(97));
+   * // Prints: 8 (97 is the decimal ASCII value for 'a')
+   * console.log(buf.indexOf(Buffer.from('a buffer example')));
+   * // Prints: -1
+   * console.log(buf.indexOf(Buffer.from('a buffer example').slice(0, 8)));
+   * // Prints: 8
+   *
+   * const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');
+   *
+   * console.log(utf16Buffer.indexOf('\u03a3', 0, 'utf16le'));
+   * // Prints: 4
+   * console.log(utf16Buffer.indexOf('\u03a3', -4, 'utf16le'));
+   * // Prints: 6
+   * ```
+   *
+   * If `value` is not a string, number, or `Buffer`, this method will throw a`TypeError`. If `value` is a number, it will be coerced to a valid byte value,
+   * an integer between 0 and 255.
+   *
+   * If `byteOffset` is not a number, it will be coerced to a number. If the result
+   * of coercion is `NaN` or `0`, then the entire buffer will be searched. This
+   * behavior matches [`String.prototype.indexOf()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf).
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const b = Buffer.from('abcdef');
+   *
+   * // Passing a value that's a number, but not a valid byte.
+   * // Prints: 2, equivalent to searching for 99 or 'c'.
+   * console.log(b.indexOf(99.9));
+   * console.log(b.indexOf(256 + 99));
+   *
+   * // Passing a byteOffset that coerces to NaN or 0.
+   * // Prints: 1, searching the whole buffer.
+   * console.log(b.indexOf('b', undefined));
+   * console.log(b.indexOf('b', {}));
+   * console.log(b.indexOf('b', null));
+   * console.log(b.indexOf('b', []));
+   * ```
+   *
+   * If `value` is an empty string or empty `Buffer` and `byteOffset` is less
+   * than `buf.length`, `byteOffset` will be returned. If `value` is empty and`byteOffset` is at least `buf.length`, `buf.length` will be returned.
+   * @since v1.5.0
+   * @param value What to search for.
+   * @param [byteOffset=0] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
+   * @param [encoding='utf8'] If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.
+   * @return The index of the first occurrence of `value` in `buf`, or `-1` if `buf` does not contain `value`.
+   */
+  indexOf(
+    value: string | number | Uint8Array,
+    byteOffset?: number,
+    encoding?: Encoding,
+  ): number;
+  /**
+   * Identical to `buf.indexOf()`, except the last occurrence of `value` is found
+   * rather than the first occurrence.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('this buffer is a buffer');
+   *
+   * console.log(buf.lastIndexOf('this'));
+   * // Prints: 0
+   * console.log(buf.lastIndexOf('buffer'));
+   * // Prints: 17
+   * console.log(buf.lastIndexOf(Buffer.from('buffer')));
+   * // Prints: 17
+   * console.log(buf.lastIndexOf(97));
+   * // Prints: 15 (97 is the decimal ASCII value for 'a')
+   * console.log(buf.lastIndexOf(Buffer.from('yolo')));
+   * // Prints: -1
+   * console.log(buf.lastIndexOf('buffer', 5));
+   * // Prints: 5
+   * console.log(buf.lastIndexOf('buffer', 4));
+   * // Prints: -1
+   *
+   * const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');
+   *
+   * console.log(utf16Buffer.lastIndexOf('\u03a3', undefined, 'utf16le'));
+   * // Prints: 6
+   * console.log(utf16Buffer.lastIndexOf('\u03a3', -5, 'utf16le'));
+   * // Prints: 4
+   * ```
+   *
+   * If `value` is not a string, number, or `Buffer`, this method will throw a`TypeError`. If `value` is a number, it will be coerced to a valid byte value,
+   * an integer between 0 and 255.
+   *
+   * If `byteOffset` is not a number, it will be coerced to a number. Any arguments
+   * that coerce to `NaN`, like `{}` or `undefined`, will search the whole buffer.
+   * This behavior matches [`String.prototype.lastIndexOf()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/lastIndexOf).
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const b = Buffer.from('abcdef');
+   *
+   * // Passing a value that's a number, but not a valid byte.
+   * // Prints: 2, equivalent to searching for 99 or 'c'.
+   * console.log(b.lastIndexOf(99.9));
+   * console.log(b.lastIndexOf(256 + 99));
+   *
+   * // Passing a byteOffset that coerces to NaN.
+   * // Prints: 1, searching the whole buffer.
+   * console.log(b.lastIndexOf('b', undefined));
+   * console.log(b.lastIndexOf('b', {}));
+   *
+   * // Passing a byteOffset that coerces to 0.
+   * // Prints: -1, equivalent to passing 0.
+   * console.log(b.lastIndexOf('b', null));
+   * console.log(b.lastIndexOf('b', []));
+   * ```
+   *
+   * If `value` is an empty string or empty `Buffer`, `byteOffset` will be returned.
+   * @since v6.0.0
+   * @param value What to search for.
+   * @param [byteOffset=buf.length - 1] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
+   * @param [encoding='utf8'] If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.
+   * @return The index of the last occurrence of `value` in `buf`, or `-1` if `buf` does not contain `value`.
+   */
+  lastIndexOf(
+    value: string | number | Uint8Array,
+    byteOffset?: number,
+    encoding?: Encoding,
+  ): number;
+  /**
+   * Creates and returns an [iterator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) of `[index, byte]` pairs from the contents
+   * of `buf`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * // Log the entire contents of a `Buffer`.
+   *
+   * const buf = Buffer.from('buffer');
+   *
+   * for (const pair of buf.entries()) {
+   *   console.log(pair);
+   * }
+   * // Prints:
+   * //   [0, 98]
+   * //   [1, 117]
+   * //   [2, 102]
+   * //   [3, 102]
+   * //   [4, 101]
+   * //   [5, 114]
+   * ```
+   * @since v1.1.0
+   */
+  entries(): IterableIterator<[number, number]>;
+  /**
+   * Equivalent to `buf.indexOf() !== -1`.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('this is a buffer');
+   *
+   * console.log(buf.includes('this'));
+   * // Prints: true
+   * console.log(buf.includes('is'));
+   * // Prints: true
+   * console.log(buf.includes(Buffer.from('a buffer')));
+   * // Prints: true
+   * console.log(buf.includes(97));
+   * // Prints: true (97 is the decimal ASCII value for 'a')
+   * console.log(buf.includes(Buffer.from('a buffer example')));
+   * // Prints: false
+   * console.log(buf.includes(Buffer.from('a buffer example').slice(0, 8)));
+   * // Prints: true
+   * console.log(buf.includes('this', 4));
+   * // Prints: false
+   * ```
+   * @since v5.3.0
+   * @param value What to search for.
+   * @param [byteOffset=0] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
+   * @param [encoding='utf8'] If `value` is a string, this is its encoding.
+   * @return `true` if `value` was found in `buf`, `false` otherwise.
+   */
+  includes(
+    value: string | number | Buffer,
+    byteOffset?: number,
+    encoding?: Encoding,
+  ): boolean;
+  /**
+   * Creates and returns an [iterator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) of `buf` keys (indices).
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('buffer');
+   *
+   * for (const key of buf.keys()) {
+   *   console.log(key);
+   * }
+   * // Prints:
+   * //   0
+   * //   1
+   * //   2
+   * //   3
+   * //   4
+   * //   5
+   * ```
+   * @since v1.1.0
+   */
+  keys(): IterableIterator<number>;
+  /**
+   * Creates and returns an [iterator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) for `buf` values (bytes). This function is
+   * called automatically when a `Buffer` is used in a `for..of` statement.
+   *
+   * ```js
+   * import { Buffer } from "internal:deno_node/polyfills/internal/buffer";
+   *
+   * const buf = Buffer.from('buffer');
+   *
+   * for (const value of buf.values()) {
+   *   console.log(value);
+   * }
+   * // Prints:
+   * //   98
+   * //   117
+   * //   102
+   * //   102
+   * //   101
+   * //   114
+   *
+   * for (const value of buf) {
+   *   console.log(value);
+   * }
+   * // Prints:
+   * //   98
+   * //   117
+   * //   102
+   * //   102
+   * //   101
+   * //   114
+   * ```
+   * @since v1.1.0
+   */
+  values(): IterableIterator<number>;
+}
+
+export const SlowBuffer: {
+  /** @deprecated since v6.0.0, use `Buffer.allocUnsafeSlow()` */
+  new (size: number): Buffer;
+  prototype: Buffer;
+};
+
+export const atob: typeof globalThis.atob;
+export const Blob: Blob;
+export const btoa: typeof globalThis.btoa;
+export const constants: {
+  MAX_LENGTH: number;
+  MAX_STRING_LENGTH: number;
+};
+export const kMaxLength: number;
+export const kStringMaxLength: number;
+
+declare const exports: {
+  atob: typeof atob;
+  Blob: Blob;
+  btoa: typeof btoa;
+  Buffer: Buffer;
+  constants: typeof constants;
+  kMaxLength: typeof kMaxLength;
+  kStringMaxLength: typeof kStringMaxLength;
+  SlowBuffer: typeof SlowBuffer;
+};
+
+export default exports;